Carbureter.



C. R. GREUTER.

CARBURETER.

APPLICATION FILED AUG.25| l9l5 Patented July 9, 1918.

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- CARBURETER.

APPLICATION FILED Aue.25. 1915 1 72,036. Patented July 9, 1918.

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CHARLES R, GBEUTER, 0F SAUGUS, MASSACHUSETTS,

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To all whom it may concern:

Be it known that I, CrrARLns R. GREUTER, a citizen of the United States, residing at Saugus, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Carbureters, of which the following is a specification, such as will enable. those skilled in the art to which it appertains' to make and use the same. i 1 j p Q Thisinvention relates to carbureters for use in connection with eXplosive engines using liquid fuel,.and the object thereof is to provide a carbureter of this class which will be, simple in. construction, efficient in operation, and particularly to provide simple and efiicient means for removing the needle valve in order-that the parts may be cleaned without' disturbing theadjustment and to provide means whereby the needlevalve may be adjustedwithreference to the fuel; nozzle within the range of the requirements of the carbureter, at the same time so limiting the range of the adjustment of the needle valve that it cannot be forced against its seat on :the fuel nozzle and the needle valve or its seat thereby injured or destroyed; topro- .vide anindicator showing the adjustment of the needle'valve with reference to the fuel nozzle, so that if the'adjustment becomes disturbed it may be readilyreadjusted by the operator. This and the'other objects of my invention will more fully appear in the following specification, of which the'accom- ,panying drawingsform a part. 1 v

Certain features of'the invention generally illustratedin the drawings andmore or less fully described in the specification form" thesubject matter of myvv companion application, Serial No. 47,284,. filed' August 25, .1915, for carbureters, and'accordingly are notclaim ed herein: Y s Figure 1 is-a sectional elevation of my invention; Fig, 2 .a plan "view,,partlyin section, showing one of the needle valves re-h moved; .Fig. 3 ardetailed viewof onerof the needle ,valves man housing Fig; 1' a plan view, partly in,section, of theneedle valve,

its. housing and of-that portion of the care bureter shellinrswhichsthe needle and its housing @is inserted; Fig. 5 a g-detailed view, partly. in, section, showing .:the means employed for locking-lithe needle; valve and its housing in the carbureter shel-l; Fig. 6 plan viewer the needle valve; and Fig. 7 a plan Specification of Letters ratem.

7 Application filed August 25, 1915. Serial No. 47,285.

Patented. July 9, 1918;

View of the needle valve with the indicator disk removed.

Similar characters designate similar parts throughout the accompanying drawings. My carbureter as shownin the accompanying drawings is of the multiple type, and is provided with a shell or casing 1, having air intake openings 2 and 3, communicating with venturis and 5, which discharge into a chamber 6. The casing is also provided with a neck 7 in which is mounted a throt- .tle valve 8, and the neck is provided with ,flanges 9, by which the carbureter is secured to the manifold. Each of the venturis is provided. with a liquid fuel nozzle 10 in communication with a chamber 11, which is supplied with fuel from the float feed chamber 12. In chambers-13 in the walls of the casing 1 are mounted housings lt which are securedinposition by studs 15. The housings 14 are internally screw-threaded to receive the screw-threaded stems 16 of the tapered needlevalves 17 which project into the nozzles 10 and are the means employed forregulating the supply of fuel. The housings lt are each providetlwvitli a stop 18, on the disk-like head 19. The stem of the valve is provided with a disk shaped head 20, in

which a number ofscrew-threaded holes 21 are formed. The periphery. of the disk 20 is provided with grooves 20 and a spring 22 is secured to the casing by a stud 23, the outer end of the spring 22 being held in contact with the periphery of the disk 20 with its rib 22 in engagementwith grooves 20 so as to prevent'rotation of the disk except when. the spring. is withdrawn from the grooves of the disk. A disk 24 is secured on the outer face of tl1edisk'2O.bystuds 25 and 26," stud. 26 being of sufficient length to project below the lower face ofthe disk 20, and: contact-withthe stop 18. when the needle valveiis rotated, thereby limiting .the rotationof the needle valve and its adjustment with reference to its: fuel nozzle. To the outer end ofthe valve stem issecured a universal joint 27 to which is secured a rod ing movementbn-theguidestemfiO. This V valv e 29 determines the vacuum in the yenmounted at 36. The weight of this valve 33 determines the vacuum which 'inust be cre-' ated in the chamber 6 before the venturi- 5 and its nozzle are brought into action.

determined by't'he-sca le on the dial 24, and r In'assembling, the valves 17 are rotated in their housing until they are in contact with their seats in the throat of the fuel nozzles 10. They are then rotated slightly away from their seats and each stud 26- is next inserted, in its screw-threadedhole 21, which is immediately to the right of'the'stop l8, and hence prevents the needle valve from being rotated so far as to bring it into .con tact with its seat in t-he throat of the 'fuel nozzle 10. The'pitch of thethreads on the valvestemsis such that approximately onehalf of a revolution of the needle valve will withdraw it sufliciently from its seat to "cause its nozzle to supply the correct amount of fuel, and rotation of the valve, counter clockwise, until the stud 26 is in contact with the oppositeside of the stop 18, will cause its nozzle'tojsupply anexces'sive amount of fuel,

and the rotation of the valve in .the opposite or clockwise direction until the stud '26 'comes into contact with the stop 18 will cause the nozzle to supply an inadequate amount of liquid fuel. The stop and stud, however, provide adequate range for adjustment and prevent the turning down of the needle valve far enough to bring it into contact with its seat, and thereby prevents injury to the needle valve and its seat'by inexperienced operators; l/Vhen 'the needle valve has been adjusted its position is easily ifv the adjustment is disturbed it can be readily restorejdfby theoperator. The dial 2-1 *r dingon the dial-may be st p Q I shoulchbe so located or placed in position on the head "20 that when the stud -26is in contact with the right hand side of the stop 18 and the flow of fuel is practically shut ofi, zeroon the dial'will be opposite the rib on the'spring '22 which engages with the grooves in the periphery 'of't he head 20, The lower ends of the studs 25 are then upset so thatthey can not afterward'be r'emoved, andfthe stud 26 is flattenednear the flower face of the .disk20 so thatc'it can not f afterward be removed, making the range of adjustment permanent; After the carbureterjhas 'been'accurately adjusted the raisedbos'sBT so that itf always be by sth elop erator.

readilyrestored to; the proper adjustment Th needlevalves-and,their'honsiagscan be readily removed bywithdrawing them from the casing after the stud 15 has been removed and without disturbing the adjustment. The studs 15 act not only as a means for securing the needle valves and their housings in the casing 1, but for securing them in the casing in the exact position which they occupied before they were withdrawn. The rod 28 serves as a convenient means for adjusting the needle valve to which it is attached and may be extended to a convenient location as,'f o1i instance, the dash .of the car to the engine of which the carbureter is attached, so that the adjustment may be made when the car is run ning. I

' the employment of nozzles 10 in the form of readily removable nipples, I am enabled to construct and assemble'the' carbureterwithgreat facility, and in the event of a nipple becoming clogged or injured, can

readily replace it by winiotherj. 'I -may' also 7 substitute one of larger or smaller .outlet' in case this bede'sirable. By having the needle valve enter the tip of the nozzle, it is made to aid in the difius'ion or spreading of the liquid jet emerging from the nozzle.

The internal threading ofthehousingsde I to receive the threaded stems of the needle valves, and the arrangement of the housings to slide freely into closefittingsockets locking them in'pl'ace by pins 15., insures the unvarying seating of the housings and all carried thereby, since the pins can only be inserted when the housings arejfu'lly seated Within their sockets and turned to i housing which itlocks in place may be withdrawn wlt-hout in any manner disturbing the adjustment of the'needlevalve, and with the ability to, lie-position or adjust'the' needl v valve absolutely and unfailingly in" case it be turned in any degree whatever whilejthe housing is dismounted. flVhen once adusted, the needle valve can-*notufnder any circumstances be forced into actual Contact with the'nozzle,hencejcaninot ine jure said nozzle, nor sorcompletely'icloselit as to prevent a l-i-mitedamount of rae escaplng 1n the act of starting the motor, to

Vwhic'h the carbureter is applied, i

Having described invention 'tien;thereto;'*a retainingxdevi'c'e for said housing capable 'of application only'fiwhen th h ses i "iris me s re eeme position; and a stop carried by the housing and co-acting with said needle valve to limit the movement of the latter toward said nozzle.

2. In a carbureter, the combination of a casing provided with a socket to receive a housing; a housing removably mounted in said socket; a needle valve longitudinally adjustable in said housing; a fuel nozzle mounted in the casing in axial alinement with the needle valve; a stop carried by the housing; and a co-acting stop carried by. the needle valve, said stops serving by their co-action to limit the movements of the needle valve both toward and from the fuel nozzle, and said housing being made to closely fit within its socket and being held therein by a pin insertible only when the housing is perfectly seated in its predetermined position.

3. In a carburetor, the combination of a shell or casing provided with a fuel nozzle;

a socket in said casing in axial alinement with said nozzle; a housing adapted to fit accurately in said socket and provided with a stop; a needle valve longitudinally adjustable in said housing and provided with a stop arranged to co-act with the stop on the housing, and serving to limit the movement of the needle valve in its housing toward and from the nozzle; and a fastening for holding the housing in its socket, capable of application only when the socket is fully seated in its predetermined position, the housing, needle valve and stops being removable bodily from the casing and without relative movement between themselves.

Signed at Saugus, in the county of Essex and State of Massachusetts, this 19th day of August, 1915.

CHARLES R. GREUTER. Witnesses:

FERDINAND PILZ, RUDoLF E. GRE TER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0; 

